Malicious PDF — malware analysis report

Static analysis result for SHA-256 03436775a7b76443…

MALICIOUS

PDF

73.7 KB Created: 2021-02-28 03:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aab030b92ed5e7f2070a5539c37c415 SHA-1: 6a72c333ab68ef58168ea84122931e2632950c9b SHA-256: 03436775a7b7644329367283f3d61b6435224453532afc1a4d2e425e1f5ea020
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users interested in OBD2 scan tools. This URL, along with numerous other embedded URLs, suggests the document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/123?utm_term=how+to+use+can+obd2+scan+tool
    • https://cdn.sqhk.co/bugininaxi/jckjgje/lubewemavakemebajosajul.pdf
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5ff8cdec44108.pdf
    • https://cdn.sqhk.co/jogeguzotire/ijieeRp/best_movies_prime_video_imdb.pdf
    • http://xinumazujo.iblogger.org/arch_enemy_discography.pdf
    • https://cdn-cms.f-static.net/uploads/4414153/normal_5fe8fc412e7a8.pdf
    • https://cdn.sqhk.co/sowodopevew/xgojihc/fifth_edition_character_sheet_apk.pdf
    • https://cdn.sqhk.co/xoxapivasif/ggdgfic/yahoo_mail_organized_email_download.pdf
    • http://mists.space/94928022036frabr.pdf
    • https://cdn.sqhk.co/lofakekaf/gjahi5r/37236250626.pdf
    • https://cdn.sqhk.co/baluwofuk/Swigjgd/bee_bot_robot_emulator.pdf
    • https://cdn.sqhk.co/nanijamu/dpJuje2/tetris_apk_offline.pdf
    • http://stroy-level.ru/zafexkj7mi.pdf
    • https://cdn-cms.f-static.net/uploads/4487386/normal_602f0fc50a3f5.pdf
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5ff05b56d6615.pdf
    • http://sixawuragime.iblogger.org/balu_telugu_movie_bgm_free.pdf
    • http://draiwenstore.online/dofixodopisuluvkoj2m.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fafinonez.rf.gd/article_13_movie_song.pdf
    • http://mutexuwe.epizy.com/dubadu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e43c.bin
71b664b8053bb13167b7a22412cd93ff7ba565e3aa2725a4fd96a89b996073fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE43C 5164 bytes
font_01_sfnt_off0000f5ef.bin
cd9c2922047f7545813e8f868583cf131efe71e66438e3ac5e4e65c72b2157d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EF 10624 bytes

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